The Simpsons: 10 Important Details That Are Almost Never Mentioned

It was long-speculated by fans that something odd was up with Milhouse's parents, given the frankly worrying physical resemblance they bare to one another in terms of hair colour, glasses, and even the shape of their faces.

Well, the truth finally came out in season 26's "Let's Go Fly a Coot," which while mercifully not revealing the pair to be siblings, confirmed that Kirk and Luann Van Houten are indeed cousins - and Milhouse has a forked tongue as a result.

Of course it happened to Milhouse, of all people.

There have admittedly been several wink-wink references to this possibility throughout the show, such as Luann mentioning that she's from Shelbyville, where it's indeed legal to marry your cousin.

But the outright confirmation seemed like the show's writers finally throwing fans a bone, presumably with the hope that they would then shut up about it for good.